MBR6045PT Equivalent & Substitute Parts

Part Overview

The MBR6045PT is a Schottky diode array manufactured by Diodes Incorporated, configured as a 1 Pair Common Cathode with a maximum reverse voltage of 45V and average rectified current of 60A per diode. The device is packaged in TO-3P-3 (SC-65-3) through-hole configuration and operates across a junction temperature range of -55°C to 150°C.

The MBR6045PT is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production and field replacements. Substitute parts maintain the core electrical specifications while offering alternative packaging, improved performance characteristics, or active product status from current manufacturers.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io) (per Diode)	60 A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 60 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 45 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-3P-3, SC-65-3
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MBR6045PT is determined by the following critical parameters:

Mandatory Matching Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Mounting Type: Through Hole
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Current Rating Considerations: The MBR6045PT operates at 60A average rectified current per diode. Substitute parts are grouped by current capacity: 15A, 20A, 30A, and 40A ratings. Selection depends on application requirements. Parts rated at 30A or higher provide closer electrical equivalence to the original 60A specification.

Package Compatibility: The original MBR6045PT uses TO-3P-3 packaging. Substitute parts transition to TO-247-3 packaging, which maintains through-hole mounting but offers different physical dimensions and thermal characteristics.

Forward Voltage Characteristics: Forward voltage varies across substitute options from 510 mV to 780 mV at rated current. Lower forward voltage reduces power dissipation and heat generation.

Reverse Leakage Current: Reverse leakage ranges from 250 µA to 30 mA at 45V across substitute options. Lower leakage improves efficiency in low-current applications.

Temperature Range: Operating temperature ranges extend to 175°C in several substitute options, compared to the original 150°C maximum.

Parameter Comparison

Part Number	Manufacturer	Io (A)	Vf (mV) @ If	Ir (µA/mA) @ 45V	Tj (Max) (°C)	Package	Product Status
MBR6045PT	Diodes Incorporated	60	750 @ 60A	1 mA	150	TO-3P-3	Obsolete
DSA30C45HB	IXYS	15	740 @ 15A	250 µA	175	TO-247-3	Active
DSA60C45HB	IXYS	30	770 @ 30A	450 µA	175	TO-247-3	Active
DSA80C45HB	IXYS	40	780 @ 40A	680 µA	175	TO-247-3	Active
DSB60C45HB	IXYS	30	620 @ 30A	10 mA	150	TO-247-3	Active
DSB80C45HB	IXYS	40	620 @ 40A	15 mA	150	TO-247-3	Active
DSSK60-0045A	IXYS	30	690 @ 30A	1 mA	175	TO-247-3	Active
DSSK80-0045B	IXYS	40	510 @ 40A	30 mA	150	TO-247-3	Active
STPS4045CWY	STMicroelectronics	20	760 @ 20A	200 µA	175	TO-247-3	Active
STPS6045CW	STMicroelectronics	30	630 @ 30A	500 µA	175	TO-247-3	Active
STPS60L45CW	STMicroelectronics	30	550 @ 30A	1.5 mA	150	TO-247-3	Active

Engineering Selection Recommendations

For Direct Electrical Equivalence (30A-40A Current Range):

Parts DSA60C45HB, DSA80C45HB, DSSK60-0045A, DSSK80-0045B, STPS6045CW, and STPS60L45CW provide the closest electrical performance to the MBR6045PT within practical current ratings. These parts maintain 45V reverse voltage, Schottky technology, 1 Pair Common Cathode configuration, and fast recovery characteristics. All are active products with current manufacturing status.

For Lowest Forward Voltage (Reduced Power Dissipation):

DSSK80-0045B (510 mV @ 40A) and STPS60L45CW (550 mV @ 30A) offer the lowest forward voltage drop, reducing thermal load in power conversion applications. DSSK80-0045B provides the most significant improvement in efficiency.

For Extended Temperature Operation:

DSA30C45HB, DSA60C45HB, DSA80C45HB, STPS4045CWY, and STPS6045CW support junction temperatures to 175°C, compared to the original 150°C maximum. These options enable operation in higher ambient temperature environments.

For Matched Reverse Leakage Characteristics:

DSSK60-0045A matches the original 1 mA reverse leakage specification at 45V, providing identical leakage performance. STPS60L45CW offers 1.5 mA leakage, closely approximating the original specification.

For Automotive Applications:

STPS4045CWY carries AEC-Q101 qualification and automotive grade designation, suitable for automotive and harsh environment applications.

Package Transition Considerations:

All substitute parts transition from TO-3P-3 to TO-247-3 packaging. PCB layout modifications are required. TO-247-3 packages provide improved thermal performance through enhanced lead design compared to TO-3P-3.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MBR6045PT with a 30A-rated substitute in a 60A application?

A: No. The MBR6045PT is rated for 60A average rectified current per diode. Substitutes rated at 30A or 40A are suitable only for applications requiring those current levels. Exceeding the rated current of a substitute part causes thermal stress and device failure. Application current requirements must be verified before selection.

Q: What is the primary difference between IXYS DSA and DSB series parts?

A: Both series maintain identical current ratings and voltage specifications. The DSB series exhibits lower forward voltage (620 mV vs. 770 mV for DSA60C45HB at 30A) but higher reverse leakage current (10 mA vs. 450 µA). DSB parts reduce power dissipation; DSA parts reduce leakage current. Selection depends on application priorities.

Q: Why do substitute parts use TO-247-3 packaging instead of the original TO-3P-3?

A: TO-247-3 is the current industry standard for high-current Schottky diode arrays. TO-3P-3 is obsolete. TO-247-3 provides superior thermal performance, improved lead design, and wider manufacturer support. PCB redesign is necessary for package transition.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original MBR6045PT specification.

Q: Which substitute offers the best thermal performance?

A: DSSK80-0045B provides the lowest forward voltage (510 mV @ 40A), resulting in the lowest power dissipation and heat generation. STPS60L45CW (550 mV @ 30A) offers the second-best thermal performance. Lower forward voltage directly reduces junction temperature rise in operation.

Q: Can I use a 20A-rated part (STPS4045CWY) as a substitute?

A: STPS4045CWY is suitable only for applications requiring 20A or less. It is not a direct substitute for the 60A MBR6045PT. Use only if application current requirements are confirmed at 20A or below.

Q: What is the significance of reverse leakage current variation across substitutes?

A: Reverse leakage ranges from 200 µA to 30 mA at 45V. Lower leakage reduces standby power consumption and improves efficiency in low-current or idle conditions. Higher leakage increases power loss. Selection depends on application duty cycle and efficiency requirements.

Q: Do all substitute parts support the same temperature range as the original?

A: No. The original MBR6045PT operates to 150°C maximum junction temperature. Several substitutes (DSA series, STPS4045CWY, STPS6045CW) extend to 175°C. Others (DSB series, DSSK80-0045B, STPS60L45CW) maintain 150°C maximum. Verify application temperature requirements before selection.

Q: Is STPS4045CWY suitable for automotive applications?

A: Yes. STPS4045CWY carries AEC-Q101 qualification and automotive grade designation. It is the only substitute part with automotive certification in this list.

Q: What inventory status should I consider for procurement?

A: All substitute parts are active products with current manufacturing status. Inventory levels vary: DSSK60-0045A has the highest inventory (558,400 pcs), while DSB80C45HB has lower availability (728 pcs). Verify supplier inventory before design commitment.

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